Synonyms of indefinable

1 Syllable
dire
2 Syllables
horrid, heinous, odious, evil, fearful, monstrous, frightful, dreadful, awful, shocking, beastly
3 Syllables
inhuman, loathsome, description, alarming, outrageous, frightening, nameless, obnoxious, appalling, repugnant, horrible, atrocious, revolting, disgusting, repellent
4 Syllables
unspeakable, detestable, ineffable, elusive, repulsive, offensive, untellable, calamitous, overwhelming, execrable, elusory
5 Syllables
preternatural, undescribable, unutterable, abominable, indescribable, inexpressible, inconceivable, unbelievable
6 Syllables
unimaginable, incommunicable